GPT-5 launched in August 2025 with a 400,000-token context window, multimodal text-and-image input, test-time compute, and access for about 700 million ChatGPT users worldwide.
OpenAI’s ChatGPT runs on GPT-4o (GPT-4 Omni), introduced in early 2025 as a multimodal model that handles text, images, and voice. GPT-4.5, code-named Orion,
Supervised learning trains on labeled data to predict outputs, enabling tasks like spam detection, house-price prediction, and cat image recognition with labeled photos. Unsupervised
Neural networks are brain-inspired models that learn from data by adjusting weights and biases, not by hand-coding every rule. They consist of layers—input, one